vscanf, vfscanf, and vsscanf : vscanf vfscanf vsscanf « stdio.h « C Tutorial

1. C Tutorial
2. stdio.h
3. vscanf vfscanf vsscanf

The functions vscanf(), vfscanf(), and vsscanf() are functionally equivalent to scanf(), fscanf(), and sscanf(), respectively, except that the argument list has been replaced by a pointer to a list of arguments. This pointer must be of type va_list, which is defined in the header .

#include <stdio.h>
  #include <stdarg.h>

  void get_message(char *format, ...)
  {
    va_list ptr;

    va_start(ptr, format);

    vscanf(format, ptr);

    va_end(ptr);
  }

  int main(void)
  {

    int i;
    printf("integer:");
    get_message(" %d ", &i);

    printf("%d", i);

    return 0;
  }